多级同步感应线圈发射器电枢内膛磁场分布特性影响因素分析

Analysis of effects on in-bore magnetic field distribution characteristic of multi-stage SICL armature

电磁弹在同步感应线圈发射器内发射时需要承受强磁场环境,为探索电磁弹内磁场分布特性,提出元器件布局原则,针对多级同步感应线圈发射器电枢内膛的强磁场分布特性进行了分析,并通过发射器仿真模型对影响电枢内中轴线上磁场分布的影响因素进行了分析。结果表明:电枢的厚度越大,一定范围内发射性能越好,但其产生的环向涡流也越大,从而会抵消减小电枢内膛中的磁感应强度,厚度的增加会减缓磁感应强度的下降速率;电枢的外径越大,其发射性能越好,其中轴线上磁感应强度越小;电枢材料的导电性能越差,电枢内膛中轴线上的磁感应强度越大,发射性能也越差;电枢头部磁感应强度远小于其尾部的磁感应强度,由此可指导后续电磁弹设计以提高安全性。

Aimed at the high in-bore magnetic induction intensity generated by synchronous induction coil launcher(SICL),an analysis of magnetic field distribution effects on armature central axis was made by building a finite element model(FEM).Simulation results show that the thicker the arma-ture,the better the launch performance in a certain range,the stronger the inductive eddy current and the weaker the magnetic induction intensity in armature central axis will be caused but the slower the drop in the reduction period;that the larger the outer diameter of armature,the better the launch per-formance,and the weaker the magnetic induction intensity in armature central axis;that the poorer the electrical conductivity of the armature material,the stronger the magnetic induction intensity in armature central axis,and the poorer the launch performance;that the magnetic induction intensity of the front of the armature is far weaker than that of the tail,which can guide the subsequent electro-magnetic missile design to improve safety.